Who knows, we might not get more Cybertron DVDs for a long, long time.

As for Galaxy Force, they are region 2. You can't play them on US DVDs without cracking the region protection or buying a region 2 player. If you know all that and have it covered, then check eBay. I don't know of any US online stores selling GF DVDs. However, Yahoo! Auctions Japan most certainly would, but their auctions aren't open to the US - you'd have to find and contact a Japanese deputy service to act as a go-between, which will make getting the DVDs more expensive.